Rewrite Notification subsystem

In this commit:
 - delete a lot of really bad and / or unused code
 - redesign a much simpler Notification model
 - create and send notifications to the user's inbox on booking start & end
 - migrations
 - emails user when booking is ready and when it ends

Not in this commit:
 - Creating notifications from lab messages
 - warning messages when a booking is about to end
 - creating "summary" notifications when e.g. a booking has been fulfilled by a lab

Change-Id: I69b4dc36c3f2bce76d810106baadeef5a562cc7d
Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>

2 files changed, 0 insertions, 130 deletions

diff --git a/dashboard_notification/__init__.py b/dashboard_notification/__init__.py
deleted file mode 100644
index b5914ce..0000000
--- a/dashboard_notification/__init__.py
+++ /dev/null
@@ -1,10 +0,0 @@
-##############################################################################
-# Copyright (c) 2016 Max Breitenfeldt and others.
-#
-# All rights reserved. This program and the accompanying materials
-# are made available under the terms of the Apache License, Version 2.0
-# which accompanies this distribution, and is available at
-# http://www.apache.org/licenses/LICENSE-2.0
-##############################################################################
-
-
diff --git a/dashboard_notification/notification.py b/dashboard_notification/notification.py
deleted file mode 100644
index 6843c76..0000000
--- a/dashboard_notification/notification.py
+++ /dev/null
@@ -1,120 +0,0 @@
-##############################################################################
-# Copyright (c) 2016 Max Breitenfeldt and others.
-#
-# All rights reserved. This program and the accompanying materials
-# are made available under the terms of the Apache License, Version 2.0
-# which accompanies this distribution, and is available at
-# http://www.apache.org/licenses/LICENSE-2.0
-##############################################################################
-
-import jsonpickle
-import pika
-
-
-class Message(object):
-    def __init__(self, type, topic, content):
-        self.type = type
-        self.topic = topic
-        self.content = content
-
-
-class Notification(object):
-    """
-    This class can be used by the dashboard and the labs to exchange notifications about booking
-    events and pod status. It utilizes rabbitmq to communicate.
-
-    Notifications are associated to an event and to a topic.
-    Events are:
-    [ 'booking_start', 'booking_end']
-    The topic is usually a POD name, ie:
-    'Intel POD 2'
-    """
-
-    def __init__(self, dashboard_url, user=None, password=None, verbose=False):
-        self.rabbitmq_broker = dashboard_url
-        self.verbose = verbose
-        if user is None and password is None:
-            self._connection = pika.BlockingConnection(pika.ConnectionParameters(
-                host=self.rabbitmq_broker))
-        else:
-            self.credentials = pika.PlainCredentials(user, password)
-            self._connection = pika.BlockingConnection(pika.ConnectionParameters(
-                credentials=self.credentials,
-                host=self.rabbitmq_broker))
-        self._registry = {}
-        self._channel = self._connection.channel()
-        self._channel.exchange_declare(exchange='notifications', type='topic')
-        self._result = self._channel.queue_declare(exclusive=True, durable=True)
-        self._queue_name = self._result.method.queue
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self._connection.close()
-
-    def register(self, function, topic, type='all'):
-        """
-        Registers a function to be called for the specified event.
-        :param function: the function to register
-        :param event: the event type
-        :param regex: a regex to specify for wich topics the function will be called. Some
-        possible Expressions can be:
-        'Intel POD 2' : Intel POD 2
-        """
-
-        if topic not in self._registry:
-            self._registry[topic] = [(function, type)]
-        else:
-            self._registry[topic].append((function, type))
-
-    def receive(self):
-        """
-        Start receiving notifications. This is a blocking operation, if a notification is received,
-        the registered functions will be called.
-        """
-        if self.verbose:
-            print('Start receiving Notifications. Keys: ', self._registry.keys())
-        self._receive_message(self._registry.keys())
-
-    def send(self, message):
-        """
-        Send an event notification.
-        :param event: the event type
-        :param topic: the pod name
-        :param content: a JSON-serializable dictionary
-        """
-        self._send_message(message)
-
-    def _send_message(self, message):
-        routing_key = message.topic
-        message_json = jsonpickle.encode(message)
-        self._channel.basic_publish(exchange='notifications',
-                                    routing_key=routing_key,
-                                    body=message_json,
-                                    properties=pika.BasicProperties(
-                                        content_type='application/json',
-                                        delivery_mode=2,  # make message persistent
-                                    ))
-        if self.verbose:
-            print(" [x] Sent %r:%r" % (routing_key, message_json))
-
-    def _receive_message(self, binding_keys):
-        for key in binding_keys:
-            self._channel.queue_bind(exchange='notifications',
-                                     queue=self._queue_name,
-                                     routing_key=key)
-        self._channel.basic_consume(self._message_callback,
-                                    queue=self._queue_name)
-        self._channel.start_consuming()
-
-    def _message_callback(self, ch, method, properties, body):
-        if self.verbose:
-            print(" [x] Got %r:%r" % (method.routing_key, body))
-        if method.routing_key not in self._registry:
-            return
-        for func, type in self._registry[method.routing_key]:
-            message = jsonpickle.decode(body.decode())
-            if message.type == type:
-                func(message)
-        ch.basic_ack(delivery_tag=method.delivery_tag)